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8. The habitable planet. Unit 3, Oceans

36. The Home planet

37. Horizon. The core

46. H.R. 2737--the Continental Scientific Drilling and Exploration Act : joint hearing before the Subcommittee on Science, Research, and Technology of the Committee on Science, Space, and Technology and the Subcommittee on Mining and Natural Resources of the Committee on Interior and Insular Affairs, U.S. House of Representatives, One Hundredth Congress, first session, November 3, 1987

47. Humanity from Space